[Exim] Usernames containing the @ character

Hi!

I have to configure exim4 on a system with users
having the @ character in their login name.

Both account and aliases information is stored in
a relational database.

My problem is, that I don't know how to tell exim, that
our user names are not email addresses. Of course, we
also have alias entries that point to local and no-local
email addresses.

I searched the docs, but could not find a solution for this.


Any help is appreciated, including RTFM. Thanks in advance!

Balazs Lecz